MRI front end apparatus and method of operation

Electricity: measuring and testing – Particle precession resonance – Spectrometer components

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

324322, G01V 300

Patent

active

054613140

ABSTRACT:
A front end unit (32) for a magnetic resonance imaging (MRI) system (20) comprises a plurality of coil attachment ports (46) to which an RF signal or tuning signal is selectively routed thereby permitting, during operation, coils (22) to remain attached to each of the plurality of ports. A signal routing controller (28, 30) selects to which of the ports the RF signal or tuning signal is to be routed. The RF front end Knit (32) is also known as the relay switchboard assembly or RSB. Each port of the RF front end is attached to a different RF coil or RF coil combination. Tuning and imaging operations can be conducted for a plurality of coils in succession, without coils having to be detached from the RF front end. The signal routing controller selectively applies the RF signal (from an RF unit) or the tuning signal (from a tuning controller) to the selected coil through a signal path unique to the selected coil. Coils not selected to be operative can be detuned.

REFERENCES:
patent: 4602213 (1986-07-01), Sugiura
patent: 4638253 (1987-01-01), Jaskolski et al.
patent: 4691164 (1987-09-01), Haragashira
patent: 4695801 (1987-09-01), Arakawa et al.
patent: 4733190 (1988-03-01), Dembinski
patent: 4763076 (1988-08-01), Arakawa et al.
patent: 4782298 (1988-11-01), Arakawa et al.
patent: 4827219 (1989-05-01), Harrison
patent: 4855680 (1989-08-01), Arakawa et al.
patent: 4881034 (1989-11-01), Kaufman et al.
patent: 5097210 (1992-03-01), Requardt et al.
patent: 5216367 (1993-06-01), Mori
patent: 5260658 (1993-11-01), Greim et al.
Hewlett Packard 3577 A Network Analyzer User's Guide, HP Product Note 3577A-1, pp. 13-15, Jun. 1992.
Hewlett Packard 8753C Network Analyzer Reference Manual, HP 8753, Appendix to Chapter 5, pp. 5-53 through 5-58, Jun. 1992.
Hewlett Packard 3577A Network Operating Manual, HP Manual #03577-900000), pp. 4-20, Jun. 1992.
Freschet, Lorenzo, "Accuracy Considerations in RF Network Measurements", Proceedings RF Technology Expo 1988, Feb. 10-12, 1988.
"Comparison of Linear and Circular Polarization for Magnetic Resonance Imaging" by Glover et al.; Journal of Magnetic Resonance 64, 255-270 (1985).
"Quadrature Detection Coils--A Further .sqroot.2 Improvement in Sensitivity" by Chen, Sank, and Hoult; Journal of Magnetic Resonance 54, 324-327 (1983).
"Elimination of Coupling Between Cylindrical Transmit Coils and Surface-Receive Coils for in Vivo NMR" by Bendal, Connelly and McKendry: Magnetic Resonance In Medicine 3, 157-163 (1986).
"Passive Decoupling of Surface Coils by Pole Insertion" by Hyde et al.; Journal of Magnetic Resonance 89, 485-495 (1990).
"Switched Surface Coil System for Bilateral MR Imaging" by Hardy et al.; Radiology 1988; 167: 835-838.
"Switched Array Coils"; Requardt et al.; Magnetic Resonance in Medicine 13, 385-397 (1990).
"The NMR Phased Array" by Roemer et al.; Magnetic Resonance in Medicine 16, 192-225 (1990).
E. Fukushima and S. Roeder: "Experimental Pulse NMR A Nuts and Bolts Approach" Addison-Wesley Publishing Co. (1981) Chapter V NMR Hardware.
R. Liboff and G. C. Dalman, "Transmission Lines, Waveguides and Smith Charts" MacMillan 1985 (date unknown).
G. Gonzalez, "Microwave Transistor Amplifiers, Analysis and Design" Prentice-Hall, Inc. 1984 Chapter 2 (date unknown).
"Efficient Remote Transmission Line Probe Tuning" by Rath; Magnetic Resonance in Medicine 13, 370-377 (1990).
"Probe Tuning Adjustments--Need They Be in the Probe?" by Walton and Conradi; Journal of Magnetic Resonance 81, 623-627 (1989).
W. Sabin & E. Schoenike, Editors "Single-Sideband Systems & Circuits" McGraw-Hill Book Co. 1987 pp. 425-429 & 460-462 (date unknown).
"An Improved Saddle Coil for MR Imaging in Resistive Magnet Systems" by Doornbos et al; Magnetic Resonance In Medicine 2, 490-494 (1985).
"Fundamental of RF and Microwave Noise Figure Measurements" by Hewlett Packard Application note 57-1 (date unknown).

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

MRI front end apparatus and method of operation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with MRI front end apparatus and method of operation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and MRI front end apparatus and method of operation will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1889105

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.